Doff, A., & Jones, C. (1999). Language in use: Beginner : self-study workbook with answer key [Băng Casset]. Cambridge: Cambridge U. P..
Trích dẫn kiểu ChicagoDoff, Adrian, và Christopher Jones. Language in Use: Beginner : Self-study Workbook With Answer Key [Băng Casset]. Cambridge: Cambridge U. P., 1999.
MLA CitationDoff, Adrian, và Christopher Jones. Language in Use: Beginner : Self-study Workbook With Answer Key [Băng Casset]. Cambridge: Cambridge U. P., 1999.
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